Companies that report their hydraulic fracturing chemicals to FracFocus have become less forthcoming since 2013, finds a study of 96,000 disclosures. By Lisa Song Since 2013, energy companies that report their hydraulic fracturing chemicals to the FracFocus website have become less forthcoming, increasingly citing the use of proprietary compounds to limit disclosure, according to a new study from the journal Energy Policy. The paper, written by two Harvard University researchers, is the most comprehensive analysis of FracFocus to date. They examined more than 96,000 disclosure forms filed between March 2011 and April 2015, highlighting trends and offering suggestions to improve the site’s accuracy and completeness.